Air-brake connection.



No. 735,735. PATENTED AUG. 11,4 1903. S. FEUST & B. L. WRIGHT.

AIR BRAKE CONNECTION.

APPLIOATION PILBD JULY 29. 1902.

A 2 SHEETS-SHEET 1.

NO MODEL WITNESS s:

. No. 735,735. RATRNTRD AUG. 11, 190s.

s. RRUST R R. L. WRIGHT.

JRTR BRAKE CONNECTION.

APPLICATION FIED JULY 29. 1902. No TTQDRL T z SHEETS-SHEET 2.

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-tions referred to-is usually packed with UNITED STATES 5 'PatentedAugust 11, 1903.

PATENT Ormes.

SIGMUND FEUST AND BERTON L. WRIGHT, OF NEV YORK, N. Y.

AIR-BRAKE CONNECTION.

SPECIFICATION forming part of Letters Izatent No. 735,735, dated August11, 1903. Application ned July 29, 1902. j seran No. 117,479. (Ntmodel.)

To @ZZ whom t maycowernf.-

Be it known that we, SIGMUND FEUST and BERTON L. WRIGHT,of the boroughof the Bronx, in the city of New York, countyof New York, and State ofNew York, citizens of the United States, have invented new and usefulImprovements in Air-Brake Connections, of4 which the following is afull, clear, and exact description. y

Our invention relates to the flexible hose connections which are usedbetween locomotives and cars of' railroad-trains for the purpose ofconnecting or coupling the air-pipes of a locomotive to the air-pipes ofthe car following it and theair-pipes of one car of a train to theair-pipes of the following car, so as to unite quickly such pipes intoone continuous air-braking system for the whole train when thelocomotive isatta'ched or the train vmade up and to part quickly suchconnections when the cars are to be uncoupled and ourim provementsrelate more particularly to the means. of effecting the air-retainingcapacity of such connections latrthe places where thehose andcouplingsarejoined, aswell as in the walls of the hose or tubing composing theconnec tion along its entire length.

The object of ourinventionis to devise such a form of construction forair-brake connections as will enable flexible tubing made wholly orchiefly of some material other than rubber to be'used successfully inplace ofthe thick rubber hose now almost generally used in theconstruction of such connections. Experience has demonstrated that suchrubber hose is unsatisfactory and unreliable in actual use, and in theopinion of practical railroad men the use of a flexible tubing whereinmetal orsome other equally durable material is the principal factor inplace of such rubber hose would be a desirable improvement if thedifficulties of joining such tubing with the couplings could besuccessfully overcome and such joints were made less subject todisruption or leakage. As metal tubing spirally wound-one of the bestsubstitutes for rubber hose in the constructionof the connecstrips ofasbestos or some textile fabric placed within its folds, the heatnecessarily employed in soldering or brazing the couplings improvementstherein.

to the tubing is apt to disintegrate or destroy the packing, and therebyleave vents in the latter, and the mechanical devices heretoforesuggested for the purpose of effecting such joints without soldering orbrazing do not prevent the air from finding a passage into theextremities of the folds of the tubing inside of the couplings andthence through such folds and their interstices out of the connection,rendering it non-serviceable. To overcome these difficulties, we havedesigned the connection and the specially-constructed,

parts thereof shown in the accompanying drawings and hereinafterdescribed.

Referring to the drawings, Figure lisa side View of our improvedflexible pipe connection broken in the center. Fig. 2 is a centrallongitudinal section on the line 2 2 of Fig. 3. Fig. 3 is across-section on the line 3 3 of Fig. 2. Fig. 4 is an enlarged detailedsection of the connection at the union of the tubing A with theair-brake pipe coupling C and the nut D. Fig. 5 is alongitudinal sectionof the air-brake coupling-head as modified by our Fig. 6 is a plan Viewof the saine air-brake couplinghead shown in Fig. 5. Fig. 7 is a view ofone end of the rubber hose or lining E2, showing a flange and exteriorspiral screwthread; and Fig. 8 is a view of one end of a rubber hose E8,showing in section a gradually-enlarged thicknessa; at

the end.

In the different figures the saine letters indicate the same parts..

In the drawings,A is the spirally-wound and double-seamed metal tubing.

Bis the air-brake coupling-head, and C is the air-brake pipe-coupling.

b and b', respectively, indicate the annular projections or nipples of Cand B; d and d', the inside screw-threads, ande and e' the outsidescrew-threads, of suchnipples.

D and D' are metal nuts, of which'f and f are the respective fianvges. f

E is a soft-rubber tubing serving as an interior air-tight coating forthe metal tubing as well as a sealing over the extremities of such metaltubing.

g and g' indicate the folds of the soft-rubber tubing.

F is a flanged metal ferrule, and M is also a flanged metal ferrulewhich lits within the former when covered with the rubber tubing.

ICO

Gisarubbergasketsuflcientlysoft to allow it to spread radially whensqueezed by the flange of the nut D. G is a similar gasket.

H and H' are washers, also of' soft rubber, inserted in the couplings.

K is an exterior covering, of rubber cloth or other suitable material.

L is the cord or Wire binding the rubber cloth to the connection andshown in section in Fig. 4.

M and M are flanged metal ferrules,o flange, and y y screw-threadsmolded on rubber hose E2, (shown in Fig. 7,) and a: enlarged thicknessat end of rubber hose E3. (Shown in Fig. 8.)

The metal tubing which we prefer to use is made double-seamed andspirally wound in accordance with the invention of E. Levavasseur assecured by United States Letters Patent No. 330,910 on November 24,1885, although other flexible metal tubing may be used. We also preferto have the tubing packed between its overlapping folds with asbestostape or other suitable material, but do not insist upon any packing. Forthe tubing E any suitable material other than rubber may be used.

The coupling-head Band the air-pipe coupling C are respectively of usualconstruction, except as to the part or nipple to which the tubing isconnected, and such part in each coupling is of like construction.

Referring to the air-pipe coupling C, such part is furnished inside withan annular projection c, having a flat bearing-surface upon its sidetoward the mouth of the nipple, and is interiorly from such projectionto its mouth threaded with a spiral thread which will fit into andengage with the spiral spaces ou the outside of and between the folds ofthe tube A, which spaces on account of the tubing preferably used beingconstructed of strips of metal are sort of slots running parallel toeach other and spirally around the tube from end to end. Exteriorly thisnipple or joining part of the couplingisfurnished with a malescrew-thread to correspond with the female thread in the nut D. The nutD is provided with a flange f, the diameter of whose bore is such as toallow the metal tubing A to slide through it and the purpose of which isto hold the gasket G in place and squeeze it against the exteriorsurface of the metal tubingA. This nut maybe constructed perfectly roundand not, as shown in the drawings, with polygonal perimeters, the roundconstruction being preferable, as the nuts can then be turned only byspeciallyconstructed Wrenches and not by the ordinary monkey- Wrenchesused by the trainhands, and so less liable to displacement.

To construct one of our improved connections in the best manner, we takea piece of flexible metal tubing A. Into this weinsert at one end themetal ferrule F and at the other end a similar metal ferrule F. Throughthese ferr ules and the metal tubing we draw the rubber tubing E,permitting each of its ends to project beyond the ferrules F and Fadistance sufficient to allow the circumference of its edges, where itis gripped by the ferruleflanges, to correspond with the circumferenceof the bore of the line connection. Then the ferrule M is insertedwithin the rubber tubing at one end, and at the other end a like ferruleM is smilarlyinserted. 'lhe projectingportions of the rubber tubing aresqueezed between the flanges of the two ferrules F and M and F/ and M ateach end of the tubing and then turned up and held in position againstthe outside bearing surfaces of the flanges of the inner ferrules M andM', respectively, by the rubber gasket H in the airpipe coupling and thegasket H' in the airbrake coupling-head.

The air-brake coupling-head B and the airpipe coupling C are secured andfastened to the tubing A in a similar' manner, and a description of themethod of securing and fastening the one will serve to explain theother. One end of the metal tubing, prepared as stated, and the washeror gasket H (care bcing taken that such gasket holds in position thefree end of the rubber tubing E) are inserted into the air-pipe couplingC, and the metal tubing A is screwed in until the rubber gasket isfirmly seated upon the bearingsurface of the annular projection c insideof such coupling. The nutD is then turned until the surface of the boreof the gasket G expanding clutches the metal tubing A and tightly holdsthe same. This being done, the other end of the tubing is packed,secured, and fastened to the air-brake coupling-head Bin like manner.The connection may, if desired, be then covered with rubber cloth,canvas, or other suitable material K and attached by means of twine orwire L, as shown in Fig. 4. The gaskets H and H, the ferrules F and F orM and M, or all of them, may be omitted. The ends or folds of the rubbertubing may be secured in place against the flanges of the ferrules F andF' and M and M' or the flanges of whichever of such ferrules may beused, or in case such ferrules are omitted against the extremities ofthe metal tubing and the rubberlinings own inner folds. The gaskets Hand H also may be cemented to the outer folds of the softrubber liningE, and the ferrules F and M and F and M' may be secured in position inthe metal tubing and rubber lining by cement, solder, or both, or byscrew-threading. The rubber tubing E may be furnished at its extremitieswith flanges of the same material, as o, (shown iu Fig. 7,) or itsthickness may be gradually increased toward such extremities, asm,(shown in Fig. 8,) to supply ICO the place ofthe folds g and g', andthe rubber hose E may or may not be furnished on the outside withscrew-threads molded thereon to tit in the spaces or spiral slots on theinside of the metal tubing, in which case only one ferrule at each endmay be used or none at all.

As thus constructed our connection may be used as a substitute for therubber-hose connections now almost generally employed and in thecustomary manner.

We do not claim as new the rubber tubing used only as a lining for themetal tubing; nor do We claim as new the rubber-cloth covering used inconnection with the metal tubing without any interior coating.

lVe are aware that attempts have been previously made to make air-brakeconnections with flexible metallic tubing interiorly coated or linedwith rubber or other material and united with the couplings bymechanical means without the use of soldering or brazing; but we believeourselves to be the first to utilize the rubber lining as a means ofpreventing the passage of the air through the ends of the folds of themetal tubing, as well as through the surface of the same, and also thefirst to fasten the metal tubing and coupling together by the devicesand in the manner hereinbefore described and shown.

We claim- 1. In an air-brake connection, the spirallywounddouble-scanned metal tubing A, the soft-rubber tubular lining E therein,combined with the coupling-head B at one end and the air-pipe coupling Cat the other end, these couplings being of usual construction except thenipple of each is exteriorly screwthreaded and interiorly furnished withan annular dat bearing-surface projection c and screw-threaded therefromto the mouth with threads to engage the outside slots between i thefolds of the metal tubing, the flanged nuts D and D" `and the gaskets Gand G', the flanges of the former, when such nuts are screwed on,compress the gaskets G and G' against the ends of the nipples andradially against the metal tubing thereby aiding its retention in placewhen screwed into the couplings B and C, the flanged ferrules F and Mand F' and `M' and the gaskets H and H', which respectively with thefolded ends of the rubber lining E form the packing between theextremities of the metal tubing and the fiat bearing-surfaces of theinterior projections of the couplings, all constructed and combined ashereinbefore described and shown.

2. In an air-brake connection, the spirallywound double-seamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usual construction except the nipple of each isexteriorly screwthreaded and interiorly furnished with an annular flatbearing-surface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between nuts D and D' and thegaskets G and G', the

"DI U flanges of the former, when such nuts are screwed on, compress thegaskets G and G' against the ends of the nipples and radially againstthe metal tubing, thereby aiding its retention in place, when screwedinto the couplings B and C, the flanged ferrules F and F' and thegaskets H and H', which respectively with the folded ends of the rubberlining E form the packing between the extremities of the metal tubingand the flat bearingsurfaces of the interior projections of thecouplings all constructed and combined as hereinbefore described andshown.

3. In an air-brake connection the spirallywound double-seamed metaltubing A the soft-rubber tubular lining E therein,`com bined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usual construction except the nipple of each isexterior-1y screwthreaded and interiorly furnished with an annular datbearingsurface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of the metaltubing, the flanged nuts D and D' and the gaskets G and G', the flangesof the former when such nuts are screwed on compress the gaskets G andG' against the ends of the nipples and radially against the metal tubingthereby aiding its retention in place, when screwed into Vthe couplingsB and C, and the gaskets H and H' which respectively with the foldedends of the rubber lining E, form the packing between the extremitiesofthe metal tubing and the flat bearing-surfaces of the interiorprojections of the couplings all constructed and combined ashereinbefore described and shown.

4. In an air-brake connect-ion the spirallywound double-seamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usual construction except the nipple of each isexteriorly screwthreaded and interiorly furnished with an annular Hatbearing-surface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of the metaltubing, and the flanged nuts D and D' and the gaskets G and G', theflanges of the former when such nuts are screwed on, compress thegaskets G and G' against the ends of the nipples and radially againstthe metal tubing, thereby aiding its retention in place, when screwedinto the couplings B and C, the folded ends of the rubber lining E fornithe packing between the extremities of the metal tubing and the fiatbearing-surfaces of the interior projections of the couplings allconstructed and combined as hereinbefore described and shown.

5. In an air-brake connection the spirallywound double-seained metaltubing A, the soft-rubber tubular lining E'therein, combined with thecoupling-head B at one end IOC IIO

and the air-pipe coupling C at the other end, these couplings being ofusual construction except the nipple of each is exteriorly screwthreadedand interiorly furnished with an annular flat bearing-surface projectionc and screw-threaded therefrom to the mouth with threads to engage theoutside slots between the folds of the metal tubing, the flanged nuts Dand D and the gaskets G and G', the flanges of the former, when suchnuts are screwed on, compress the gaskets G and G' against the ends ofthe nipples and radially against the metal tubing, thereby aiding itsretention in place, when screwed into the couplings B and C, the flangedferrules F and Mv and F and M which respectively with the folded ends ofthe rubber lining E, form the packing between the extremities of themetal tubing and the flat bearing-surfaces of the interior projectionsof the couplings, all constructed and combined as hereinbefore describedand shown.

6. In an air-brake connection the spirallywound double-seamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usualconstruction except the nipple of each isexteriorly screwthreaded and interiorly furnished with an annular flatbearing-surface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of the metaltubing, the flanged nuts D and D and the gaskets G and G', the flangesof the former, when such nuts are screwed on, compress the gaskets G andG.

against the ends of the nipples and radially against the metal tubing,thereby aiding its retention in place, when screwed into the couplings Band C, the flanged ferrules F and F', which respectively with the foldedends of the rubber lining E form the packing between the extremities ofthe metal tubing and the flat bearing-surfaces of the interiorprojections of the couplings all constructed and combined ashereinbefore described and shown.

7. In an air-brake connection the spirally- Wonnd double -seamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usual construction except the nipple of each isexteriorly screwthreaded and interiorly furnished with an annular flatbearing-surface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of the metaltubing, the flanged nuts D and D and the gaskets G and G', the flangesof the former when such nuts are screwed on, compress the gaskets G andG against the ends of the nipples and radially against the metal tubing,thereby aiding its retention in place, when screwed into the couplings Band C, the flanged ferrules M vaar/35 and M', which respectively withthe folded ends of the rubber liningE form the packing between theextremities of the metal tubing and the flat bearing-surfaces of theinterior projections of the couplings, all constructed and combined ashereinbefore described and shown.

8. In an air-brake connection the spirallywound double-seamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,these couplings being of usual construction except the nipple of each isexteriorly screwthreaded and interiorlyfurnished with an annular flatbearing-surface projection c and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of the metaltubing, the flanged nuts D and D' and the gaskets G and G', the flangesof the former, when such .nuts are screwed on, compress the gaskets Gand G' against the ends of the nipples and radially against the metaltubing, thereby aiding its retention in place, when screwed into thecouplings B and C, the flanged ferrules M and M and the gaskets H and Hwhich respecfively, with the folded ends of the rubber lining E, formthe packing between the extremities of the metal tubing'and the flatbearing-surfaces of the interior projections of the couplings, allconstructed and combined as hereinbefore described and shown.

9. The air-tight pipe-joint for spirallywound metal tubing, consistingof' a couplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular projection c andscrewthreaded therefrom to the mouth with threads to engage the slotsbetween the folds on the outside of tubing A and exteriorly withscrewthreads, the flanged nut D screwed upon the nipple and its flangedesigned to force the gasket G against the end of the nipple and squeezesuch gasket radially against the outer Vsurface of tubing A and therebyaid the retention of the tubing within the coupling, the ferrules F andM and the gasket H- which gasket, with the flanges of such ferrules andthe folds of the lining E, are for the 'purpose of forming a packingbetween the IOC IIO

force the gasket G against the end of the nipple and squeeze such gasketradially against the outer surface of tubing A and thereby aid theretention of the tubing within the coupling, the ferrule F' and thegasket H', which gasket and the flange of such ferrule and the folds ofthe lining E are for the purpose of forming a packing between the end ofthe tubing and the flat bearing-surfa'ce of the .projection c', allcombined and constructed as hereinbefore described, and shown.

11. The air-tight pipe-joint for spirallywonnd metal tubing, consistingof a couplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular projection c' andscrewthreaded therefrom to the mouth with threads to engage the slotsbetween the folds on the outside of tubing A and exteriorly withscrewthreads, the flanged nut D' screwed upon the nipple and its flangedesigned for forcing a gasket G' against the end of the nipple andsqueezing such gasket radially against the outer surface of tubing A andthereby aiding the retention of the tubing within the coupling, theferrule'M' and the gasket H', which, with the flange of such ferrule andthe folds of the lining E, are for the purpose of forming a packingbetween the end of the tubing and the flat bearing-surface of theprojection c', all combined and constructed as hereinbefore describedand shown.

12. The air-tight pipe-joint for spirallywound metaltubing, consistingof acouplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular projection c' andscrewthreaded therefrom to the mouth with threads to engage the slotsbetween the'folds on the outside of tubing A and exteriorly withscrewthreads, the flanged nut D' screwed upon the nipple and its flangedesigned for forcing a gasket G' against the end of the nipple andsqueezing such gasket radially against the outer surface of the tubing Aand thereby aiding the retention of the tubing within the coupling, theferrules F' and M', the flanges of which and the folds of the liningEare intended for a packing between the end of the tubing and the flatbearing-surface of the projection o', all combined and constructed ashereinbefore described and shown.

13. The air-tight pipe-jointfor spirallywound metal tubing, consistingof acouplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular projection c' andscrewthreaded therefrom to the mouth with threads to engage the slotsbetween the folds on the outside of tubing A and exteriorly withscrewthreads, the nut D' screwed upon the nipple, the flange of such nutbeing designed for forcing the gasket G' against the end of the nippleand squeezing such gasket radially against the outer surface of tubing Aand thereby aiding its retention within the coupling, and the gasketH',which with the folds of the lining E are intended for a packing betweenthe end of the tubing and the flat bearing-surface of the projection c',all combined and constructed as hereinbefore described and shown.

14. The air-tight pipe-joint for spirallywound metal tubing, consistingof a couplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular ro'ection c' andscrewf .l

threaded therefrom to the month with threads to engage the slots betweenthe folds on the outside of tubingA and exteriorly with screwthreads,the nut D' screwed upon the nipple, the flange of such nut beingdesigned for forcing a gasket Gr' against the end of the nipple andsqueezing such gasket radially against the outer surface of tubing A andthereby aiding the retention of the tubing within the coupling, theextremities of the lining E be ing folded for the purpose of forming apacking between the end of the tubing and the flat bearing-surface ofthe projection c', all

' combined and constructed as hereiubefore described and shown.

15. The air-tight pipe-joint for spirallywound metal tubing, consistingof a couplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly with an annular projection c andscrewthreaded therefrom to the mouth with threads to engage the slotsbetween the folds on the outside of tubing A and exteriorly withscrewthreads, the nut D' screwed upon the nipple and the ange of suchnut designed for forcing a gasket G' against the end of the nipple andsqueezing such gasket radially against the outer surface of tubing A,and thereby aiding the retention of the tubing within the coupling, theferrule F' and the gasket H', the folds of the lining E, the flange ofsuch ferrule F' and the gasket H' being designed for a packing betweenthe end of the tubing and the flat bearing-surface of the projection c',all combined and constructed as hereinbefore described and shown. j

16. The air-tight pipe-joint for spirallywound metal tubing, consistingof a couplinghead B of usual construction, with one of its nippleslengthened and furnished interiorly.

with an annular projection c' and screwthreaded therefrom to the mouthwith threads to engage the slots between the folds on the outside oftubing A, and exteriorly with screw-threads, the nut D' screwed upon thenipple and the flange of such nut being intended for forcing the gasketG' against the end of the nipple and squeezing such gasket radiallyagainst the outer surface of tubing A and thereby aiding the retentionof the tubing within the coupling, the ferrule M' and the gasket H',which gasket and the flange of such ferrule, together with the folds ofthe lining E, are intended for a packing between the end of the tubingand the flat bearing- ICO IIO

surface of the projection c', all combined and I constructed ashereinbefore describedand shown.

17. The air-brake coupling-head B having a icugthened nipple U, which isprepared for the reception of the end of a double-seamed spirally-woundmetal tube by being furnished with interior screw-threads to engage inthe slots of the metal tube and with an inside annular projection c' toretain between its outer bearing-surface and the end of the metal tube agasket or other packing, and the nipple b' being furnished alsoexteriorly with screwV` threads upon which a flanged nut may be screwedto squeeze a rubber gasket H and fasten the coupling upon the tubing,all constructed as hereinbefore set forth.

18. The air-brake pipe-coupling C, having a screw-th readed nipple ofusual construction at one end and at the other end a lengthenedconnecting-nipple Z), which is prepared for the reception of the end ofa double-seamed spirally-wound metal tube and with an inside annularprojection c to retain between its outer bearing-surface and the end ofthe tube a gasket or other packing, the nipple b being furnished alsoexteriorly with screwthreads upon which a flanged nut may be screwedagainst a gasket to retain the tube within the coupling, all constructedas hereinbefore set forth.

19. The air-brake connection-hose consisting of the flexible,spirally-wound, doubleseamed metal tubing A, the soft-rubber tubularlining E therein, and the flanged ferrules F and F' respectively, seatedin the opposite ends of the metal tubing A, and the flanged ferrules Mand M/ respectively, seated within the rubber lining at the oppositeends of the said tubing A, their flanges holdingin place the foldedprojections` of the rubber lining E; all constructed, combined andarranged as and for the purposes hereinbefore set forth.

20. The air-brake connection-hose consisting of the flexible,spirally-wound, doubleseamed metal tubing A, the soft-rubber, tubularlining E therein, and the flanged ferrules M and M respectively, seatedwithin the rubber lining at the opposite` ends of the said tubing A,their flanges holding in place the folded projections of the rubberliningE; all constructed, combined and arranged as and for the purposeshereinbefore set forth.

21. The air-brake connection-hose consisting of the flexible,spirally-wound, doubleseamed metal tubing A, the soft-rubber, tubularlining E therein, and the flanged ferrules F and F respectively, seatedin the opposite ends of the metal tubing A; all constructed, combinedand arranged as and for the purposes hereinbefore set forth.

22. The air-brake connection-hose consisting of the flexible,double-seamed, spirallywound metal tubing A, combined with thesoft-rubber, tubular lining E, whose ends are projected beyond theopposite extremities of the metal tubing and doubly folded over suchextremities, and securely cemented thereto, leaving unobstructed theinterior bore of such rubber-lined metal tubing; all constructed andcombined as hereinbefore set forth.

225. In an air-brake connection, constructed of the flexible,double-seamed, spirally-\vound metal tubing A, and the couplings D andB, each interiorly provided with the projections o and c', theimprovement consisting of the rubber tubing E, lining the metal tubingA, and sealing with its folded ends g and g', the extremities of suchmetal tubing and packing the spaces between such extremities and theflat bearing-surfaces of the projections c and o', all as hereinbeforeset forth.

24. In an air-brake connection the spirallywound double-steamed metaltubing A, the soft-rubber tubular lining E therein, combined with thecoupling-head B at one end and the air-pipe coupling C at the other end,

these couplings being of usual construction except the nipple of eachisexteriorly screwthreaded and interiorly furnished with an annular flatbearing-surface projection c, and screw-threaded therefrom to the mouthwith threads to engage the outside slots between the folds of thetubing, the nuts D and D and the gaskets G and G; the flanges of theformer, when such nuts are screwed on, compress the gaskets G and Gagainst the ends of the nipples and radially against the metal tubing,thereby aiding its retention in place, when screwed into the couplings Band C, the ferrules F and M and F and M and the gaskets H and H whichrespectively with the folded ends of the rubber lining E and the flangesof such ferrules form the packing between the extremities of the metaltubing and the flat bearing-surfaces of the interior projections o, c ofthe couplings, and also the rubber-cloth covering K fastened with thewire binding L, all constructed and combined as hereinbefore describedand shown.

25. As an improved lining-hose for spirallywound metal tubing, therubber hose E2, furnished at each end with the flange c to serve as apacking between the extremities of the metal tubing and thebearing-surfaces within the couplings into which the metal tube is to beinserted.

26. As an improved lining-hose for spirallywound metal tubing, therubber hose E3, molded inside at each end with a thickness graduallyincreasing toward the mouth of the tube to serve as a packing betweenthe extremities of the tubing and the bearing-surfaces within thecouplings into which the metal tubing is to be inserted.

27. In an air-brake connection, the spirallywound double-seamed metaltubing A, combined with the rubber tubular lining E2, with thecoupling-head B and the air-pipe coupling C respectively screwed uponthe opposite ends of themetal tubing and being of usual construction,except the nipple of each is exteriorly screw-threaded and interiorlyfurnished. with an annular projection c and screwthreaded therefrom tothe mouth with threads IOO' IIO

to engage the outside slots between the folds of the metal tubing, thenuts D and D' and the gaskets G and G; the flanges ofthe former, whensuch nuts are screwed on, compress such gaskets against the ends of thenipples and radially against the metal tubing, thereby aidingitsretention in place, when screwed into the couplings B and C, theflanges of the rubber tubing Ezpack the in terstices between the ends ofthe metal tubing and the bearingsuriaces of the projections c c'. K

28. In an air-brake connection, the spirallywound double-seamed metaltubing A, with the rubber tubular hose E3, placed within or upon theoutside of the tubing A or both within and upon the outside of the same,combined with the coupling-head B and the air-pipe coupling C,respectively screwed upon the opposite ends of the tubing, and being ofusual construction except the'nipple of each is exteriorlyscrew-threaded and interiorly furnished with annular projections c c'respectively and screw-threaded therefrom to the mouth with threads toengage the outside slots between the folds ot the tubing, the gaskets Gand G and the nuts D and D', the flanges of which squeeze the gasketsagainst the ends of the nipples and radially against the metal tubing,thereby aiding its retention in place, when screwed into the couplings Band C, the thickened extremities m of the tubing E3 serving as a packingin the interstices between the extremities of the tubing A and thebearing-surfaces of the projections c and c' within the respectivecouplings.

Dated July 1, 1902.

SIGMUND FEUST. BERTON L. WRIGHT.

Witnesses:

HOWARD G. BEsToR, Ensim M. AGARD.

